Comments on: MySQL Indexes — to MySQL what green kryptonite is to Smallville universe Bizarro

By: Rahul

Rahul — Wed, 20 Jan 2010 07:20:27 +0000

good…. Helped me to understand index implementation

By: Lars Hetland

Lars Hetland — Tue, 09 Jun 2009 14:10:05 +0000

Hi yetanothergeek and thanks for commenting. I have updated the section you commented on and have tried to explain what I ment better. Have a nice day.

By: yetanothergeek

yetanothergeek — Tue, 09 Jun 2009 10:48:45 +0000

Hi, Good article but i guess you should simplify/explain better the follow sentence:
“A primary key lookup often goes at optimal speed but in the case of the deleted lookup MySQL wouldn’t even use the index. When the optimizer engine predicts a hit percentage of more than about 30% it will opt for the often faster sequential read of the entire data set.”

By: MySQL - Configuration, query cache and other thingamajigs (part 2 of 2) » select *

Tue, 01 Jul 2008 07:06:32 +0000

[...] is the third post in a short series about MySQL. Read the first here, and the second here. This one covers this and that and has no set topic. The post is quite long, so I’ve split it [...]

By: MySQL - Configuration, query cache and other thingamajigs (part 1 of 2) » select *

Fri, 27 Jun 2008 14:52:02 +0000

[...] is the third post in a short series about MySQL. Read the first here, and the second here. This one covers this and that and has no set topic. The post is a bit long, so I’ve split it [...]